DE3475020D1 - Information storage disk transducer position control - Google Patents

Information storage disk transducer position control

Info

Publication number
DE3475020D1
DE3475020D1 DE8484114113T DE3475020T DE3475020D1 DE 3475020 D1 DE3475020 D1 DE 3475020D1 DE 8484114113 T DE8484114113 T DE 8484114113T DE 3475020 T DE3475020 T DE 3475020T DE 3475020 D1 DE3475020 D1 DE 3475020D1
Authority
DE
Germany
Prior art keywords
information storage
position control
storage disk
transducer position
disk transducer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8484114113T
Other languages
German (de)
Inventor
Mark Johnson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE3475020D1 publication Critical patent/DE3475020D1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • G11B21/083—Access to indexed tracks or parts of continuous track on discs
    • G11B21/085—Access to indexed tracks or parts of continuous track on discs with track following of accessed part
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G11B5/553—Details
DE8484114113T 1983-12-30 1984-11-23 Information storage disk transducer position control Expired DE3475020D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/566,942 US4613916A (en) 1983-12-30 1983-12-30 Information storage disk transducer position control system requiring no servo pattern on the storage disk

Publications (1)

Publication Number Publication Date
DE3475020D1 true DE3475020D1 (en) 1988-12-08

Family

ID=24265085

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484114113T Expired DE3475020D1 (en) 1983-12-30 1984-11-23 Information storage disk transducer position control

Country Status (4)

Country Link
US (1) US4613916A (en)
EP (1) EP0150306B1 (en)
JP (1) JPS60145572A (en)
DE (1) DE3475020D1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1261467A (en) * 1985-11-28 1989-09-26 Akira Minami Focus servomechanism control system of optical disc system having offset setting means
US4808900A (en) * 1987-03-02 1989-02-28 Unisys Corp. Bi-directional difference counter
US4858041A (en) * 1987-10-20 1989-08-15 Mattel, Inc. Tracking servo control
JP2642672B2 (en) * 1988-06-29 1997-08-20 富士通株式会社 Optical disk drive
US4988932A (en) * 1989-10-10 1991-01-29 Eastman Kodak Company Constant velocity servosystem wtih high positional accuracy
EP0651377A1 (en) * 1993-10-27 1995-05-03 Hewlett-Packard Company Position sensors for computer disk drives
US6057976A (en) * 1994-04-28 2000-05-02 Canon Kabushiki Kaisha Apparatus for detecting rotational displacement information of a rotating object
US5442172A (en) * 1994-05-27 1995-08-15 International Business Machines Corporation Wavefront reconstruction optics for use in a disk drive position measurement system
TW256914B (en) * 1994-05-27 1995-09-11 Ibm Servo-writing system for use in a data recording disk drive
DE19834107A1 (en) * 1998-07-29 2000-02-03 Ibm Atomic storage
JP3307347B2 (en) * 1998-12-02 2002-07-24 松下電器産業株式会社 Magnetic recording device and optical element
DE19858199A1 (en) * 1998-12-17 2000-06-21 Thomson Brandt Gmbh Device for reading and / or writing optical recording media
US20040263561A1 (en) * 2003-06-27 2004-12-30 Kurt Thiessen System and method of printing within circular area

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426337A (en) * 1964-12-21 1969-02-04 Ibm Positioning system for random access device
FR2054937A5 (en) * 1969-07-31 1971-05-07 Thomson Csf
US3634682A (en) * 1970-02-13 1972-01-11 Polaroid Corp Laser interferometer-type servo-positioning system comprising velocity control network and phase-lock network
DE2107135A1 (en) * 1971-02-15 1972-08-24 Leitz Ernst Gmbh Method and device for non-contact measurement on rotating workpieces
US3720924A (en) * 1972-03-09 1973-03-13 Honeywell Inc Optical mass memory
JPS5160881A (en) * 1974-09-14 1976-05-27 Canon Kk Idobuzai no ichiseigyosochi
JPS6011374B2 (en) * 1975-02-05 1985-03-25 株式会社日立製作所 Information reproducing method and device
JPS54116901A (en) * 1978-03-03 1979-09-11 Nippon Telegr & Teleph Corp <Ntt> Signal reproducer
US4221995A (en) * 1978-07-24 1980-09-09 The United States Of America As Represented By The United States Department Of Energy Linear motor drive system for continuous-path closed-loop position control of an object
US4371902A (en) * 1980-06-30 1983-02-01 International Business Machines Corporation Disk initialization method
JPS5746355A (en) * 1980-09-04 1982-03-16 Matsushita Electric Ind Co Ltd Speed controller of turntable
JPS57197486A (en) * 1981-05-29 1982-12-03 Clarion Co Ltd Laser doppler speedometer
JPS5819713A (en) * 1981-07-29 1983-02-04 Olympus Optical Co Ltd Equalizing system for readout data length on disk
US4470696A (en) * 1981-10-14 1984-09-11 Systems Research Laboratories, Inc. Laser doppler velocimeter

Also Published As

Publication number Publication date
JPH0158584B2 (en) 1989-12-12
EP0150306A1 (en) 1985-08-07
JPS60145572A (en) 1985-08-01
EP0150306B1 (en) 1988-11-02
US4613916A (en) 1986-09-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee